I'm happy that I have brought laughter because I have been shown by many the value of it in so many lives, in so many ways.
“There are many qualities that make a great leader. But having strong beliefs, being able to stick with them through popular and unpopular times, is the most important characteristic of a great leader.”
“I hope that some day the practice of producing cowpox in human beings will spread over the world - when that day comes, there will be no more smallpox.”